CN102953308A - Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed - Google Patents
Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed Download PDFInfo
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Abstract
本发明公开了一种竹材加筋双向增强半填半挖软弱路基施工方法，它包括以下步骤：(1)竹材的加工，竹片的处理，竹筋笼、竹筋格网及竹筋U型锚钉的制作；(2)平整场地，桩位放样；(3)利用振冲法或振动沉管法施工形成竹筋笼碎石桩并在桩顶铺设碎石垫层；(4)台阶开挖，铺设、连接及锚固竹筋格网，回填土料并碾压找平。本发明的特征在于竹筋笼能有效提高碎石桩的承载力和稳定性；竹筋格网可加强填方区与挖方区的连接，提高路基的整体性，降低差异沉降，防止沿填挖交接面滑动失稳；本发明的有益效果是，采用新型竹筋作为加筋材料，适应了建筑行业朝着低碳、节能、环保以及可持续性发展的方向，并在满足路基承载力及变形稳定性的要求下节约了投资。
The invention discloses a bamboo reinforcement two-way reinforcement half-fill half-dug construction method for weak subgrade, which comprises the following steps: (1) bamboo processing, bamboo chip treatment, bamboo reinforcement cage, bamboo reinforcement grid and bamboo reinforcement U-shaped The production of anchors; (2) leveling the site, setting out the pile position; (3) using the vibrating method or vibrating pipe sinking method to form a bamboo cage gravel pile and laying a gravel cushion on the top of the pile; (4) step opening Excavation, laying, connection and anchoring of bamboo reinforcement grid, backfilling with soil material and rolling and leveling. The invention is characterized in that the bamboo reinforcement cage can effectively improve the bearing capacity and stability of the gravel pile; the bamboo reinforcement grid can strengthen the connection between the filling area and the excavation area, improve the integrity of the roadbed, reduce differential settlement, and prevent The junction surface slides and loses stability; the beneficial effect of the present invention is that the new type of bamboo reinforcement is used as the reinforcement material, which adapts to the direction of low-carbon, energy-saving, environmental protection and sustainable development in the construction industry, and meets the bearing capacity and deformation of the subgrade. The investment is saved under the requirement of stability.
Description
Technical field
The present invention relates to a kind of roadbed and process job practices, relate to particularly that a kind of mountain highway is built and old road improvement project in the two-way enhancing of bamboo wood reinforcement partly fill out and partly dig weak roadbed construction method.
Background technology
In recent years, in mountain highway build and old road transformation process, frequently run into the build problem of cut-fill subgrades.Because cut-fill subgrades one side is the original state roadbed, opposite side forms by filling, between roadbed excavation zone 1 and embankment district 2, exist so natural filling out to dig interface 3, because interface both sides roadbed generating mode, physico-mechanical properties, the difference of the aspects such as underground water and roadbed internal construction often causes roadbed side slope to produce relative settlement along interface slip, sidesway or road surface along interface and causes pavement cracking; And in the work progress of cut-fill subgrades, often run into the situation that the embankment district is soft soil foundation, thereby soft soil foundation also will cause embankment district roadbed and excavation zone roadbed to produce relative settlement road pavement structure generation to be destroyed, and becomes very scabrous engineering problem.
For filling out the reinforcing of digging interface 3, traditional processing method is to adopt Application of geosynthetics-reinforced, geosynthetics can improve to be filled out the stability of digging interface 3 and reduces relative settlement, but geosynthetics is made by the chemical substance that extract in coal, oil, the natural gas, its need of production consumes mass energy, can produce a large amount of waste residues, waste water and waste gas simultaneously, can cause like this expending and the pollution of environment of the energy, in the today of advocating energetically sustainable development, the material that we need to seek a kind of energy-saving and environmental protection, low-carbon (LC) replaces; The geosynthetics construction cost is relatively high in addition.
For the anchoring of reinforcement material and the binding at superimposed position, the normal U-shaped holdfast of reinforcing bar and the steel wire of adopting in traditional construction, three shortcomings below still the use steel mainly exist in subgrade construction: one, steel easy-to-rust in wet environment; Two, contaminated environment; Three, cost is higher.
Reinforcing traditional treatment method for the weak roadbed in embankment district can be classified as three classes: the first kind is to adopt discharging consolidation; Equations of The Second Kind is vertical enhancing body (such as plain concrete pile, cement mixing pile, the CFG stake etc.) consolidation process of utilizing without drain function.The 3rd class is to utilize vertical enhancing body (broken stone pile) consolidation process that drain function is arranged.First kind method easy construction, cost are lower, foundation soil strength can improve gradually with the discharge of water, but construction period is longer; The Equations of The Second Kind method can be applicable to all kinds of reinforced soft soil grounds, but cost is relatively high; The 3rd class methods easy construction, cost is low, but because pile body self rigidity and intensity are little, needs to go along with sb. to guard him the ability pile by surrounding soil, radial deformation easily occurs and produces and bloat and shear failure in the pile body when surrounding soil is weak in the 2～4m scope of stake top, and consolidation effect is limited.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of construction material environmental protection, simple in structure, easy construction, cost lower, can satisfy the two-way enhancing of bamboo wood reinforcement of using function and life requirement simultaneously and partly fill out and partly dig weak roadbed construction method.
In order to solve the problems of the technologies described above, the two-way enhancing of a kind of bamboo wood reinforcement provided by the invention is partly filled out and is partly dug weak roadbed construction method, may further comprise the steps:
Step (1), use bamboo chip braiding bamboo reinforcement cage, bamboo reinforcement graticule mesh and the U-shaped holdfast of making bamboo reinforcement after processing is processed;
Stake position setting-out is carried out in step (2), place, smooth embankment district;
Stake position setting-out place of the bamboo reinforcement cage that makes in step (3), the use step (1) in step (2) made bamboo reinforcement cage Reinforced Gravel Pile as ground;
Step (4), at the domatic step excavation in natural hillside, step width is 2～3m, the height of every grade of step is 0.8～1.0m, and to make the horizontal wall inscription value be 2～4% reverse horizontal wall inscription;
Step (5), employing rubble are material, are the smooth hardcore bed of 30～50cm at the prepared broken stone pile end face of step (3) laying depth;
Step (6), the bamboo reinforcement graticule mesh that makes in the step (1) entirely is layed on the hardcore bed, the superimposed length of adjacent two bamboo reinforcement graticule mesh is 30～50cm, and superimposed position adopts the binding of bamboo rattan to connect;
Step (7), backfill levelling filler and grinding compacting on the bamboo reinforcement graticule mesh, when filler is filled to when parallel with the contiguous step of upper level, re-lay lower one deck bamboo reinforcement graticule mesh at the contiguous step of upper level and the filler filled and led up up, wherein the length that is layed on the step of bamboo reinforcement graticule mesh is identical with the width of bench excavation, the superimposed length of two bamboo reinforcement graticule mesh that same layer is adjacent is 30～50cm, superimposed position adopts the binding of bamboo rattan to connect, and the bamboo reinforcement graticule mesh of completing is fixed in ground every 0.8～1.2m and along road direction every the bamboo reinforcement U-shaped holdfast that 0.6～1.0m makes in step (1) at vertical road direction respectively;
Step (8), repeating step (7) are until reach design elevation of subgrade.
Described bamboo wood reinforcement enhancing is partly filled out and is partly dug weak roadbed construction method, and the step of use bamboo chip braiding bamboo reinforcement cage, bamboo reinforcement graticule mesh and the U-shaped holdfast of making bamboo reinforcement described in the above-mentioned steps (1) is as follows:
Step 1., will being not less than the mao bamboon in 3 years the length of time, to make respectively for the braiding horizontal bamboo reinforcement of bamboo reinforcement cage and the width of making the bamboo reinforcement graticule mesh be 6～8mm, thickness is that the bamboo chip of 4～6mm and the width that is used for the vertical bamboo reinforcement of braiding bamboo reinforcement cage are 15～20mm, and thickness is the bamboo chip of 6～10mm;
Step is 2., do sterilization, insect protected, preservative treatment to bamboo chip first: be 6～8% BAS with boric acid and water configuration concentration, bamboo chip be impregnated in the BAS, make solution flood bamboo chip 3～5cm, left standstill 24 hours; Then bamboo chip is taken out air-dry, when temperature natural air drying 5～7 days more than 20 ℃ the time, when temperature natural air drying 7～10 days below 20 ℃ the time; Then bamboo chip is done waterproofing work: adopt hairbrush with the styrene-butadiene-styrence modified asphalt water-repellent paint brushing bamboo chip surface that stirs evenly, brush altogether two layers, the first floor brushing is complete treats 6～8 hours again brushing second layers, total coating thickness is controlled at 0.4～0.6mm, enters step 3. until 24 hours after the bamboo chip surface coating drying;
Step 3., the bamboo chip after utilize processing is compiled into bamboo reinforcement cage, bamboo reinforcement graticule mesh and makes the U-shaped holdfast of bamboo reinforcement: the vertical long bamboo chip of 8 4～5m that adopts of bamboo reinforcement cage is evenly arranged on the circumference, the diameter of bamboo reinforcement cage is with the diameter of broken stone pile, all around make the stirrup parcel with bamboo chip again, the spacing of stirrup is 1～2cm; Each graticule mesh chip size of bamboo reinforcement graticule mesh is 15～20cm * 15～20cm, and the overall size of bamboo reinforcement graticule mesh adds the step area with roadbed area, embankment district; The U-shaped holdfast of bamboo reinforcement comprises nail body and nail tip, and nail tip length is 30～40cm, and the nail height is 3～4cm.
The two-way enhancing of described bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, during carrying out described in the above-mentioned steps (2) stake position setting-out, be to be the arranged in form stake position setting-out that square or per three pile body mid point lines are equilateral triangle by per four pile body mid point lines.
The two-way enhancing of described bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, and the bamboo reinforcement cage reinforced rubble pile construction method described in the above-mentioned steps (3) is:
The bamboo reinforcement cage is vertically put in pile hole on ground then first, and wherein the bamboo reinforcement cage is positioned at broken stone pile top, inserts rubble through vertical bamboo reinforcement cage in the stake hole, forms vertical bamboo reinforcement cage Reinforced Gravel Pile.
The two-way enhancing of described bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, makes the embankment end is high near the excavation end is low reverse horizontal wall inscription during step excavation described in the above-mentioned steps (4) and is used for strengthening bond stress between reinforcement material and the filler.
The two-way enhancing of described bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, and the bed course described in the above-mentioned steps (5) and the used filler of broken stone pile are rubble, sandstone or coarse sand, and the maximum particle diameter of particle is less than 5cm.
The two-way enhancing of described bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, when the employing bamboo rattan binding described in the above-mentioned steps (6) connects the superimposed position of bamboo reinforcement graticule mesh, before binding, first the bamboo rattan is soaked in water, strengthen the fastness of binding so that the dry after-contraction of bamboo rattan becomes tight.
Technique effect of the present invention is:
(1) adopt novel bamboo reinforcement simultaneously to the cut-fill subgrades level to vertically reinforce;
Level to: adopt horizontal bamboo reinforcement graticule mesh reinforcement can strengthen the globality of cut-fill subgrades, improve subgrade rating, reduce the relative settlement of embankment district and excavation zone, prevent that the roadbed filling district from digging along filling out that interface slides, sidesway;
Vertically: broken stone pile top arranges the bamboo reinforcement cage, can effectively limit like this pile body side direction and bloat distortion, prevents that pile body from bloating destruction and shear failure, improves the bearing capacity of broken stone pile greatly;
(2) broken stone pile and horizontal direction hardcore bed can form vertical horizontal to drainage system, in the roadbed construction process, foundation soil is because of the discharging consolidation effect, its intensity improves gradually, the consolidation settlement major part is finished, settlement after construction will further reduce, and can satisfy traffic loading increases requirement to subgrade rating and distortion day by day;
(3) bamboo reinforcement raw material source is wide, renewable.Among the present invention, the muscle material all adopts reproducible bamboo wood, the bamboo wood fast growth, the cycle of becoming a useful person is short, and output is large, and it is secure to originate, the what is more important bamboo wood is green material, its manufacturing process environmental protection, pollution-free, adapt to building trade towards the requirement of low-carbon (LC), energy-saving and environmental protection and sustainable development;
(4) bamboo reinforcement is made simply, easy construction.Among the present invention, bamboo wood can be gathered materials on the spot, because bamboo wood density is little, from heavy and light, the bamboo wood after the processing is transported to the job site can be processed into rapidly bamboo reinforcement cage, bamboo reinforcement graticule mesh and the U-shaped holdfast of bamboo reinforcement;
(5) saving investment under the safe and reliable prerequisite of highway construction can satisfied.With regard to intensity and cost, bamboo is acknowledged as the highest material of occurring in nature usefulness (as being the length of time that its tensile strength parallel to the grain of mao bamboon in 3 years is 150～250MPa, and the tensile strength of geosynthetics geo-grid commonly used is 100～200MPa) in the engineering, meet the mechanics requirement of reinforcement material fully, simultaneously bamboo reinforcement is carried out can satisfying the roadbed life requirement after sterilization, anticorrosion, insect protected and the waterproofing work, and can save the cost reduction investment than traditional muscle material expense is low.
Description of drawings
Fig. 1 is two kinds of layout plans of broken stone pile of the present invention;
Fig. 2 is bamboo reinforcement cage schematic diagram of the present invention;
Fig. 3 is bamboo reinforcement graticule mesh schematic diagram of the present invention;
Fig. 4 is the U-shaped holdfast schematic diagram of bamboo reinforcement of the present invention;
Fig. 5 is that bamboo reinforcement graticule mesh of the present invention is laid schematic diagram;
Fig. 6 is the schematic diagram after the present invention lays first floor bamboo reinforcement graticule mesh;
Fig. 7 is the schematic diagram after the present invention lays second layer bamboo reinforcement graticule mesh;
Fig. 8 is that the present invention lays the 3rd layer of schematic diagram after the bamboo reinforcement graticule mesh;
Fig. 9 is the schematic diagram after the cut-fill subgrades completion of the present invention;
Wherein 1 is excavation zone, and 2 for the embankment district, and 3 dig interface for filling out, 4 is the bamboo reinforcement cage, and 5 is broken stone pile, and 6 is hardcore bed, 7 is the bamboo reinforcement graticule mesh, 8 is step, and 9 is the U-shaped holdfast of bamboo reinforcement, and 10 is former natural hillside, 11 is the road surface, 12 is the nail tip of the U-shaped holdfast of bamboo reinforcement, and 13 is the nail body of the U-shaped holdfast of bamboo reinforcement, and 14 is filler.
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples
Embodiment 1:
Step (1), to use the length of time be that the mao bamboon bamboo wood in 4 years is made bamboo reinforcement cage 4 and bamboo reinforcement graticule mesh 7;
1., the mao bamboon bamboo wood is made width is 6mm, thickness is the bamboo reinforcement of 5mm, wherein is used for the wide 16mm of bamboo chip of braiding bamboo reinforcement cage 4 vertical bamboo reinforcements, thickness 6mm;
2., first bamboo reinforcement is done sterilization, insect protected, preservative treatment: be 8% BAS with boric acid and water configuration concentration, bamboo reinforcement be impregnated in the BAS, make solution flood bamboo reinforcement 5cm, left standstill 24 hours; Then take out bamboo reinforcement air-dry under natural environment; Again bamboo reinforcement is done waterproofing work: with styrene-butadiene-styrence modified asphalt water-repellent paint brushing bamboo chip surface, adopting first hairbrush that modified waterproof asphalt material is evenly smeared during brushing brushes in the bamboo chip surface, Deng the brushing second layer again after the first floor dry tack free of brushing, total coating thickness is controlled at 0.4～0.6mm, until entering next procedure after the bamboo reinforcement surface coating drying after 24 hours;
3., referring to Fig. 2, Fig. 3, Fig. 4, utilize the bamboo chip after processing to be compiled into bamboo reinforcement cage, bamboo reinforcement graticule mesh and to make the U-shaped holdfast of bamboo reinforcement: 8 long bamboo chips of 5m of bamboo reinforcement cage 4 vertical employings are evenly arranged on the circumference, the diameter of bamboo reinforcement cage is with the diameter of broken stone pile 5, all around use stirrup (bamboo chip) parcel, the spacing of stirrup is 2cm again; Bamboo reinforcement graticule mesh 7 each graticule mesh chip size are 20cm * 20cm, and the overall size of bamboo reinforcement graticule mesh is: wide 7m * long 22m; Nail tip 12 length of U-shaped holdfast are 30cm, and nail body 13 length are 3cm.
Step (2), place, smooth embankment district are carried out stake position setting-out according to pilespacing 1.6m by equilateral triangle layout among Fig. 1, and equilateral triangle claims again quincunx, refers to that three pile body mid point lines form equilateral triangle;
Vibroflotation method pile hole on ground commonly used in step (3), the construction of utilization building pile body, broken stone pile 5 diameters are 0.9m, length is 15m, then vertically put into bamboo reinforcement cage 4, the bamboo reinforcement cage is positioned at the top of pile body, insert rubble through vertical bamboo reinforcement cage in the stake hole, form vertical bamboo reinforcement cage Reinforced Gravel Pile, the diameter of pile body and length are decided according to the actual conditions of residing soft foundation;
Step (4), at former natural hillside 10 domatic step excavations 8, step width is 2.0m, the height of every grade of step is 1.0m, and makes that the horizontal wall inscription value is that 3% close excavation end is low and reverse horizontal wall inscription that the embankment end is high;
Step (5), employing rubble are that material (maximum particle diameter of particle is less than 5cm) is 30cm hardcore bed 6 at described broken stone pile 5 end face laying depths, require the bed course compacting smooth, horizontal, remove the spine thrust;
Step (6), referring to Fig. 6, lay bottom bamboo reinforcement graticule mesh 7 by design size: the bamboo reinforcement graticule mesh that processes is layed on the hardcore bed 6, laying is smooth, the no wrinkle phenomenon, the superimposed length of adjacent two bamboo reinforcement graticule mesh is 35cm, and superimposed position ties solid with the bamboo rattan, before the binding bamboo rattan is soaked in water, can shrink become tight after the bamboo rattan drying, thus can bundle more firm;
Step (7), referring to Fig. 7, backfill levelling earth material and grinding compacting on bamboo reinforcement graticule mesh 7, when filler 14 is filled to when parallel with the contiguous step of upper level, re-lay lower one deck bamboo reinforcement graticule mesh at the contiguous step of upper level and the filler 14 filled and led up up, wherein to be layed in the length on the step 8 be 2.0m to the bamboo reinforcement graticule mesh, the superimposed length of two bamboo reinforcement graticule mesh that same layer is adjacent is 35cm, connecting portion ties solid with the bamboo rattan, the bamboo reinforcement graticule mesh of completing every 1m, is fixed in ground every 0.8m with bamboo reinforcement U-shaped holdfast 9 along road direction at vertical road direction;
Step (8), referring to Fig. 8, Fig. 9, repeating step (7) re-lays road surface 11 until reach the roadbed elevation of top surface again.
Embodiment 2:
Step (1), to use the length of time be that the mao bamboon bamboo wood in 3 years is made bamboo reinforcement cage 4 and bamboo reinforcement graticule mesh 7;
1., the mao bamboon bamboo wood is made width is 7mm, thickness is the bamboo chip of 6mm, wherein is used for the wide 20mm of bamboo chip of the vertical bamboo reinforcement of braiding bamboo reinforcement cage, thickness 8mm;
2., first bamboo chip is done sterilization, insect protected, preservative treatment: be 6% BAS with boric acid and water configuration concentration, bamboo chip be impregnated in the BAS, make solution flood bamboo reinforcement 5cm, left standstill 24 hours; Then bamboo chip is taken out natural air drying; Again bamboo chip is done waterproofing work: with styrene-butadiene-styrence modified asphalt water-repellent paint brushing bamboo reinforcement surface, brush altogether two layers, Deng the brushing second layer again after the first floor brushing bamboo chip dry tack free, total coating thickness is controlled at 0.4～0.6mm, until entering next procedure after the bamboo reinforcement surface coating drying after 24 hours;
3., referring to Fig. 2, Fig. 3, Fig. 4, utilize the bamboo chip after processing to be woven into bamboo reinforcement cage, bamboo reinforcement graticule mesh and to make the U-shaped holdfast of bamboo reinforcement: 8 long bamboo reinforcements of 4.5m of bamboo reinforcement cage 4 vertical employings are evenly arranged on the circumference, the diameter of bamboo reinforcement cage is with the diameter of broken stone pile 5, all around use stirrup (bamboo chip) parcel, the spacing of stirrup is 1.5cm again; Bamboo reinforcement graticule mesh 7 each graticule mesh chip size are 15cm * 15cm, and the overall size of bamboo reinforcement graticule mesh is: wide 8.2m * long 35m; The nail tip of the U-shaped holdfast of bamboo reinforcement (12) is long to be 35cm, and nail body (13) is long to be 3cm.
Step (2), place, smooth embankment district are carried out stake position setting-out according to pilespacing 1.2m by arranged in squares among Fig. 1, and arranged in squares refers to that four pile body mid point lines form square;
Immersed tunnelling method pile hole on ground commonly used in step (3), the construction of utilization building pile body, broken stone pile 5 diameters are 0.6m, length is 10m, then vertically put into bamboo reinforcement cage 4, the bamboo reinforcement cage is positioned at the top of pile body, insert rubble through vertical bamboo reinforcement cage in the stake hole, form vertical bamboo reinforcement cage Reinforced Gravel Pile, the diameter of pile body and length are decided according to the actual conditions of residing soft foundation;
Step (4), on natural hillside domatic step excavation 8, step width is 2.2m, the height of every grade of step is 0.8m, and makes that the horizontal wall inscription value is that 4% close excavation end is low and reverse horizontal wall inscription that the embankment end is high;
Step (5), employing rubble are that material (maximum particle diameter of particle is less than 5cm) is 50cm hardcore bed 6 at described broken stone pile 5 end face laying depths, require the bed course compacting smooth, horizontal, remove the spine thrust;
Step (6), referring to Fig. 6, lay bottom bamboo reinforcement graticule mesh 7 by design size: the bamboo reinforcement graticule mesh that processes is layed on the hardcore bed 6, laying is smooth, the no wrinkle phenomenon, the superimposed length of adjacent two bamboo reinforcement graticule mesh is 40cm, and superimposed position ties solid with the bamboo rattan, before the binding bamboo rattan is soaked in water, can shrink become tight after the bamboo rattan drying, thus can bundle more firm;
Step (7), referring to Fig. 7, backfill levelling earth material and grinding compacting on bamboo reinforcement graticule mesh 7, when filler 14 is filled to when parallel with the contiguous step of upper level, re-lay lower one deck bamboo reinforcement graticule mesh at the contiguous step of upper level and the filler 14 filled and led up up, wherein to be layed in the length on the step 8 be 2.2m to the bamboo reinforcement graticule mesh, the superimposed length of two bamboo reinforcement graticule mesh that same layer is adjacent is 40cm, connecting portion ties solid with the bamboo rattan, the bamboo reinforcement graticule mesh of completing every 1.2m, is fixed in ground every 1.0m with bamboo reinforcement U-shaped holdfast 9 along road direction at vertical road direction;
Step (8), referring to Fig. 8, Fig. 9, repeating step (7) re-lays road surface 11 until reach the roadbed elevation of top surface again.
Claims (7)
1. the two-way enhancing of bamboo wood reinforcement is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: may further comprise the steps:
Step (1), use bamboo chip braiding bamboo reinforcement cage, bamboo reinforcement graticule mesh and the U-shaped holdfast of making bamboo reinforcement after processing is processed;
Stake position setting-out is carried out in step (2), place, smooth embankment district;
Stake position setting-out place of the bamboo reinforcement cage that makes in step (3), the use step (1) in step (2) made bamboo reinforcement cage Reinforced Gravel Pile as ground;
Step (4), at the domatic step excavation in natural hillside, step width is 2～3m, the height of every grade of step is 0.8～1.0m, and to make the horizontal wall inscription value be 2～4% reverse horizontal wall inscription;
Step (5), employing rubble are material, are the smooth hardcore bed of 30～50cm at the prepared broken stone pile end face of step (3) laying depth;
Step (6), the bamboo reinforcement graticule mesh that makes in the step (1) entirely is layed on the hardcore bed, the superimposed length of adjacent two bamboo reinforcement graticule mesh is 30～50cm, and superimposed position adopts the binding of bamboo rattan to connect;
Step (7), backfill levelling filler and grinding compacting on the bamboo reinforcement graticule mesh, when filler is filled to when parallel with the contiguous step of upper level, re-lay lower one deck bamboo reinforcement graticule mesh at the contiguous step of upper level and the filler filled and led up up, wherein the length that is layed on the step of bamboo reinforcement graticule mesh is identical with the width of bench excavation, the superimposed length of two bamboo reinforcement graticule mesh that same layer is adjacent is 30～50cm, superimposed position adopts the binding of bamboo rattan to connect, and the bamboo reinforcement graticule mesh of completing is fixed in ground every 0.8～1.2m and along road direction every the bamboo reinforcement U-shaped holdfast that 0.6～1.0m makes in step (1) at vertical road direction respectively;
Step (8), repeating step (7) are until reach design elevation of subgrade.
2. bamboo wood reinforcement enhancing according to claim 1 is partly filled out and partly dug weak roadbed construction method, it is characterized in that: the step of use bamboo chip braiding bamboo reinforcement cage, bamboo reinforcement graticule mesh and the U-shaped holdfast of making bamboo reinforcement described in the above-mentioned steps (1) is as follows:
Step 1., will being not less than the mao bamboon in 3 years the length of time, to make respectively for the braiding horizontal bamboo reinforcement of bamboo reinforcement cage and the width of making the bamboo reinforcement graticule mesh be 6～8mm, thickness is that the bamboo chip of 4～6mm and the width that is used for the vertical bamboo reinforcement of braiding bamboo reinforcement cage are 15～20mm, and thickness is the bamboo chip of 6～10mm;
Step is 2., do sterilization, insect protected, preservative treatment to bamboo chip first: be 6～8% BAS with boric acid and water configuration concentration, bamboo chip be impregnated in the BAS, make solution flood bamboo chip 3～5cm, left standstill 24 hours; Then bamboo chip is taken out air-dry, when temperature natural air drying 5～7 days more than 20 ℃ the time, when temperature natural air drying 7～10 days below 20 ℃ the time; Then bamboo chip is done waterproofing work: adopt hairbrush with the styrene-butadiene-styrence modified asphalt water-repellent paint brushing bamboo chip surface that stirs evenly, brush altogether two layers, the first floor brushing is complete treats 6～8 hours again brushing second layers, total coating thickness is controlled at 0.4～0.6mm, enters step 3. until 24 hours after the bamboo chip surface coating drying;
Step 3., the bamboo chip after utilize processing is compiled into bamboo reinforcement cage, bamboo reinforcement graticule mesh and makes the U-shaped holdfast of bamboo reinforcement: the vertical long bamboo chip of 8 4～5m that adopts of bamboo reinforcement cage is evenly arranged on the circumference, the diameter of bamboo reinforcement cage is with the diameter of broken stone pile, all around make the stirrup parcel with bamboo chip again, the spacing of stirrup is 1～2cm; Each graticule mesh chip size of bamboo reinforcement graticule mesh is 15～20cm * 15～20cm, and the overall size of bamboo reinforcement graticule mesh adds the step area with roadbed area, embankment district; The U-shaped holdfast of bamboo reinforcement comprises nail body and nail tip, and nail tip length is 30～40cm, and the nail height is 3～4cm.
3. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: during the setting-out of carrying out described in the above-mentioned steps (2) stake position, be to be the arranged in form stake position setting-out that square or per three pile body mid point lines are equilateral triangle by per four pile body mid point lines.
4. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and partly dug weak roadbed construction method, it is characterized in that: the bamboo reinforcement cage reinforced rubble pile construction method described in the above-mentioned steps (3) is:
The bamboo reinforcement cage is vertically put in pile hole on ground then first, and wherein the bamboo reinforcement cage is positioned at broken stone pile top, inserts rubble through vertical bamboo reinforcement cage in the stake hole, forms vertical bamboo reinforcement cage Reinforced Gravel Pile.
5. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: make the embankment end is high near the excavation end is low reverse horizontal wall inscription during step excavation described in the above-mentioned steps (4) and be used for bond stress between reinforcer and the reinforcement material.
6. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: the bed course described in the above-mentioned steps (5) and the used filler of broken stone pile are rubble, sandstone or coarse sand, and the maximum particle diameter of particle is less than 5cm.
7. the two-way enhancing of bamboo wood reinforcement according to claim 1 is partly filled out and is partly dug weak roadbed construction method, it is characterized in that: when the employing bamboo rattan binding described in the above-mentioned steps (6) connects the superimposed position of bamboo reinforcement graticule mesh, before binding, first the bamboo rattan is soaked in water, strengthen the fastness of binding so that the dry after-contraction of bamboo rattan becomes tight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210154495.4A CN102953308B (en) | 2012-05-17 | 2012-05-17 | Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210154495.4A CN102953308B (en) | 2012-05-17 | 2012-05-17 | Construction method of bamboo wood reinforcement bidirectional enhanced part-cut and part-fill weak roadbed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102953308A true CN102953308A (en) | 2013-03-06 |
| CN102953308B CN102953308B (en) | 2014-11-26 |
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| CN103614955A (en) * | 2013-11-25 | 2014-03-05 | 中国电力工程顾问集团西南电力设计院 | Treatment method for soft soil foundation construction road |
| CN103758135A (en) * | 2014-01-22 | 2014-04-30 | 孟凡林 | Bamboo cage well wall for geotechnical engineering dewatering well and manufacturing method thereof |
| CN104099920A (en) * | 2013-04-08 | 2014-10-15 | 同济大学 | Reinforced foundation |
| CN104695958A (en) * | 2015-03-02 | 2015-06-10 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Method for erecting first-layer ground net of ore removal stope |
| CN105133617A (en) * | 2015-08-03 | 2015-12-09 | 李世海 | Strip mine slope excavation and landslide control method |
| CN105297570A (en) * | 2015-09-25 | 2016-02-03 | 湘潭大学 | Special soil subgrade structure and construction method thereof |
| CN106677046A (en) * | 2017-01-05 | 2017-05-17 | 孙晗 | Damaged road repairing method |
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| CN110284386A (en) * | 2019-06-28 | 2019-09-27 | 中国二十冶集团有限公司 | Improve the method for the soft soil roadbed intensity of peat soil |
| CN110965416A (en) * | 2019-11-26 | 2020-04-07 | 湖南工业大学 | A Bamboo Reinforcement System and Construction Method for Reinforcing High Fill Roadbed in Mountainous Areas |
| CN111304993A (en) * | 2020-03-17 | 2020-06-19 | 长沙理工大学 | A pavement reinforced structure |
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| CN112195909A (en) * | 2020-10-20 | 2021-01-08 | 云南建投第一勘察设计有限公司 | Method for reinforcing soft foundation of road and parking lot |
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| CN104099920B (en) * | 2013-04-08 | 2016-04-20 | 同济大学 | A kind of Reinforced Foundation |
| CN104099920A (en) * | 2013-04-08 | 2014-10-15 | 同济大学 | Reinforced foundation |
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| CN103758135B (en) * | 2014-01-22 | 2015-10-28 | 孟凡林 | A kind of geotechnical engineering dewatering well bamboo cage borehole wall and preparation method thereof |
| CN103758135A (en) * | 2014-01-22 | 2014-04-30 | 孟凡林 | Bamboo cage well wall for geotechnical engineering dewatering well and manufacturing method thereof |
| CN104695958A (en) * | 2015-03-02 | 2015-06-10 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Method for erecting first-layer ground net of ore removal stope |
| CN104695958B (en) * | 2015-03-02 | 2017-03-15 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | A kind of erection method of ore removal stope first floor earth mat |
| CN105133617A (en) * | 2015-08-03 | 2015-12-09 | 李世海 | Strip mine slope excavation and landslide control method |
| CN105297570A (en) * | 2015-09-25 | 2016-02-03 | 湘潭大学 | Special soil subgrade structure and construction method thereof |
| CN106677046A (en) * | 2017-01-05 | 2017-05-17 | 孙晗 | Damaged road repairing method |
| CN106988321A (en) * | 2017-05-08 | 2017-07-28 | 湘潭大学 | A kind of miscellaneous fill foundation ditch bamboo reinforcement support system and its construction method |
| CN110284386A (en) * | 2019-06-28 | 2019-09-27 | 中国二十冶集团有限公司 | Improve the method for the soft soil roadbed intensity of peat soil |
| CN110965416A (en) * | 2019-11-26 | 2020-04-07 | 湖南工业大学 | A Bamboo Reinforcement System and Construction Method for Reinforcing High Fill Roadbed in Mountainous Areas |
| CN111304993A (en) * | 2020-03-17 | 2020-06-19 | 长沙理工大学 | A pavement reinforced structure |
| CN111636266A (en) * | 2020-07-06 | 2020-09-08 | 西安科技大学 | A kind of expressway pile-wall composite roadbed and its construction method |
| CN111636266B (en) * | 2020-07-06 | 2024-06-11 | 西安科技大学 | Expressway pile wall type composite roadbed and construction method thereof |
| CN112195909A (en) * | 2020-10-20 | 2021-01-08 | 云南建投第一勘察设计有限公司 | Method for reinforcing soft foundation of road and parking lot |
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